Which of the following statements about protein modifications is incorrect?
A. Addition of one or more sugar molecules
results in a fully mature protein called a
glycoprotein.
B. Proteins can be modified by reversible
addition or subtraction of a phosphate group.
C. Proteins can be modified following the
addition of a polyadenylated tail.
D. Phosphorylation or dephosphorylation is a
rapid way of activating or inhibiting proteins.
E. Protein modification most often causes a
change in conformation and thus a change in
function.
C
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